Help Protect
Maine Lakes

Invasive Plant Patrol Workshops

Greetings Invasive Plant Patrollers!

Because of CoViD-19, LSM had to change all training and informational sessions to an online format. All webinars and technical assistance sessions from the 2020 summer season were recorded and are posted below for your viewing at a convenient time.

Quick Links to Additional Resources

Training, Networking and Technical Support Opportunities

These first-come, first-served Zoom-based technical assistance sessions are open to all, but attendance may be limited based upon the session. Larger group and/or customized IPP team meetings may be scheduled by contacting Roberta directly at

IPPer Zoom Room

IPPer Zoom Room sessions will be held every other week through the end of May, and weekly thereafter throughout survey season. Some sessions will have a theme (to be announced in advance via the LSM e-news); other sessions will be more open ended. We welcome Invasive Plant Patrollers of all ages and abilities to drop in whenever you like to share your IPP experiences, ask questions, discuss challenges, collaborate on actions, or simply to be in the company of fellow lake stewards who share your love of lakes! Please register to join as many sessions as you like!

Please Note – Starting in June, the IPPer Zoom Room will be shifting to a weekly schedule.  Dates and registration links will be posted soon.


What’s This Aquatic Plant?

Please join us for one of our weekly online plant ID sessions. Taking our cues from the “teach a man to fish” philosophy of providing assistance, we will help walk you through the process of first, determining if you have found a suspicious plant; and next, identifying your plant. Please submit photos of any plants you would like to share at the session in advance of the session using the form link below.   PLEASE click here for directions on how to take a “readable” photo.

Please submit photos of the plants you wish to share in advance of the session.

No sessions are scheduled at this time

Using the Survey 123 App to Document IAP Screening Surveys

~Link to additional information on Survey 123~
~Link to recording~

Advanced Plant ID Webinar Series

Learn how to confidently identify milfoils, bladderworts, and common pondweeds to species level through this 3-part series presented by LSM’s Invasive Species Program Director, Roberta Hill.

Special thanks to York County Invasive Aquatic Species Project Founder and Director, Laurie Callahan, for her extensive help in preparing these webinars.

Advanced Plant ID Part 1 – Milfoils

Recorded 8/5/2020   ~ Link to recording ~


Advanced Plant ID Part 2 – Bladderworts

~ Recording from 8/12/2020 available in the near future ~


Advanced Plant ID Part 3 – Common Pondweeds

Recorded 8/19/2020  ~ Link to recording ~


IPP 101 Webinar Series

Invasive Plant Patrol 101 (LSM’s IPP certification course) is comprised of three parts:

  • Part 1 provides a general introduction to the threat of aquatic invaders;
  • Part 2 provides guidance for conducting an invasive plant screening survey, including discussion of tools and techniques; 
  • Part 3 takes a deep dive into Aquatic Plant ID with a focus on the eleven invasive aquatic plants considered to be most imminent threats to our state, and their native look-a-likes.

Participants who wish to become LSM Certified Invasive Plant Patrollers must pass a short online quiz at the conclusion of each course section. The quiz is optional for all others.

In the final stage of certification, participants are asked to collect several aquatic plants on their own, and then attend one of LSM’s regularly scheduled Plant ID Zoom Sessions (schedule and registration below) for feedback on tentative ID’s and/or guided identification.

IPP 101 Parts 1: Introduction to Aquatic Invaders in Maine

~Link to recording~
~Link to Quiz~

IPP 101 Parts 2: How to Hunt for Aquatic Invaders

~Link to recording~
~Link to Quiz~

IPP 101 Part 3: Aquatic Plants; How to Identify Maine’s 11 Most Unwanted and their Common Native Look-Alikes

~Link to recording~
~Link to Quiz~

Please Note:  To become an LSM Certified Invasive Plant Patroller you must receive 70% or more on all three quizzes and then send a completed certification form.

Special Trainings Focused Upon Recently-Confirmed Infestations

The Hunt for Invasive Milfoil in Big Lake & How You Can Help
~Link to recording~

The Hunt for Invasive Naiad in Lake Arrowhead & How You Can Help
~Link to recording~

Each webinar is specifically focused on a particular invasive aquatic plant of concern: variable water-milfoil (Myriophyllum heterophyllum) confirmed in late 2019 in Big Lake in Washington County, and spiny naiad (Najas minor) just recently confirmed in Lake Arrowhead in York County. Both sessions will include what is​ currently known about the extent of spread ​in these lakes; the biology and typical habitat of the species of concern; the key features by which each species may be positively identified; how to distinguish each from a host of native look alike plants; and importantly, what to do if one finds any suspicious aquatic plants while out on the water.

The sessions will be presented by John McPhedran (MEDEP) and Roberta Hill (LSM) in the form of a live online (Zoom) webinar. The trainings will be recorded, and ​a link to the recordings will be made available on the LSM website​, and to all interested parties. The live sessions provide an opportunity for questions and answers.

Though some time will be devoted in each of the trainings to a discussion of the specific infestations mentioned above, much of the content will be more general, covering the fundamentals of each species of concern; how to spot it, and what to do next. For this reason, all who are interested are welcome to attend.

Downeast Lakes Land Trust Presents Milfoil in Big Lake: What is it and how do we respond?

Guest Speakers: John McPhedran (Maine Department of Environmental Protection) & Roberta Hill (Lake Stewards of Maine)

This Presentation took place on June 16 at 6PM

The recent discovery of variable-leaf milfoil in Big Lake is a wakeup call for the watersheds of the Downeast Lakes region, which are threatened with the invasion of exotic plant species.  These unwanted species can cause irreparable damage to fisheries and native ecosystems, and they can be spread unintentionally on boats, float planes, and even GORE-TEX waders!  Join representatives from the Maine Department of Environmental Protection and Lake Stewards of Maine to learn about the planned response to the Big Lake infestation, as well as how to identify aquatic invasive plants, how to report outbreaks, and how to avoid accidentally spreading these harmful species.

For more on Downeast Lakes Land Trust, please visit their website.

~Link to recording~

Our Mission

The Mission of the Maine Volunteer Lake Monitoring Program is to help protect Maine lakes through widespread citizen participation in the gathering and dissemination of credible scientific information pertaining to lake health. The VLMP trains, certifies and provides technical support to hundreds of volunteers who monitor a wide range of indicators of water quality, assess watershed health and function, and screen lakes for invasive aquatic plants and animals. In addition to being the primary source of lake data in the State of Maine, VLMP volunteers benefit their local lakes by playing key stewardship and leadership roles in their communities.


The VLMP is a non-profit 501(c)(3) organization committed to the collection of information pertaining to lake water quality. For 40 years, trained volunteers throughout Maine have donated their time so that we may all learn more about one of Maine’s most beautiful and important resources — our lakes.